a) Give three examples of applications where a solid lubricant would be preferable to a liquid lubricant. For each example, explain the advantages of using a solid lubricant and suggest one suitable candidate giving reasons for your suggestion.
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(a) Give three examples of applications where a solid lubricant would be preferable to a liquid lubricant. For each example, explain the advantages of using a solid lubricant and suggest one suitable candidate giving reasons for your suggestion.
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- discuss the importace and methods of solid liquid separation processes of hydro metallurgyDescribe in words and by means of complete chemical equations, how a mixture of 1.25 g of benzoic acid tertbutylbenzene can be separated by applying the separation of 2 components by liquid-liquid extraction.Describe liquid-liquid extraction. Provide at least one application for liquid-liquid extraction in industry
- Give 3 examples for inorganic binders and write their approximate calcination temperatures.What is the main drawback of using steam distillation in the isolation of volatile oils from its matrix?Which properties would be ideal in selecting the compound to be used as a primary standard for quantitative volumetric analysis?
- What constitutes a 'reference material', and why does its utilization play a criticalrole in the chemical analysis of food products? Provide examples.Enumerate at least two important things to do to maximize yield when using vacuum filtration in the synthesis of aspirin.What is the function of a desiccant in a set-up of volatilization gravimetry? To remove nitrogen from the sample To remove sulfuric acid from the sample To remove water vapor from the sample To remove carbon dioxide from the sample
- What limitations are encountered in the apolication of sublimation as a general method of purification?The procedure for the synthesis of menthone indicates that you should use 10 cm³ of 6M sulphuric acid. Suppose that only sulphuric acid with concentration 1.5M is available in the laboratory. What volume in cubic centimetres of this solution do you need to add to the reaction mixture to replace the solution originally specified?How are the two types of emulsions different from one another? Give suitable examples to justify the difference. State two applications of emulsions.